hello when the blazer sits over nite when you start it the motor runs rough and dies when you get it to run the anti brake light and the brake light comes on and the engine has lost of power then lights will go off and service engine light comes on the codes are po122, p1122 which are egr vavle and trot sens these have been replaced by GM now they say the ecm is bad thats $600.00 from GM can you help me please thanks Sue
Oct 13, 2008 at 3:37 PM